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No. ?48,574. PATENTED JAN. 5, 1904. J. I. AYBR.

APPARATUS FOR PRODUCING BLECTRIC ARCS FOR HEATING AN LIGHTING PURPOSES.I

APPLIOATION PILED JUNE 22. 1903.

NO MODEL.

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i UNITED STATES Z Patehtd :ranuar 5, 1904;

PATENT OFFICE.

JAMES I. AYER, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO SIMPLEX ELECTRICHEATING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPO- BATION OFMASSACHUSETTS.

APPARATUS FOR PRODUCING ELECTRIC ARCS FOR HEATING AND LIGHTING PURPOSES.

SPECIEICATION forming part of Letters Patent No. '748,574, dated January5, 1904. Application filed June 22, 1903. Serial No. 162.619. (Nomodel.)

To ctZZ whom it may concern: p

Be it known that I, JAMES I. AYER, a citizen of the United States,residing at Cambridge, in the county of Middlesex and State ofMassachusetts, have invented an Improvement in Apparatus for ProducingElectric Arcs for Heating and Lighting Purposes, of which the followingdescriptionfin connection with the' accompanying drawings, is a ospecification, like letters on the drawings representing like parts. i

My present invention is an improvement in the same general line ofinvention as disclosed in my copending application, Serial No. 161,&36,and is another embodiment of the broad invention claimed in saidapplication generically.

Besides other features of the invention I herein provide means forshifting the carbons or electrodes after each use thereof, so as tobring a fresh Contacting surface into operation for further use.

Without further explanation and referring to my aforesaid applicationfor a further presentation of the general subject, my invention will befully understood by reference to the accompanying drawings, in which Ihave shown one embodiment thereof, and will be more clearly defined inthe appended claims.

In the drawings, Figu'e l represents in frontelevation sufiicientdetails of'my invention to enable the same to be understood. Fig. 2 is atransverse horizontal sectional View thereof, taken on the line 2 2,Fig; 1. At the front of the supporting plate or standard a is a carryingbar or frame a', se-

cured at & (see Fig. 2) on the projecting arms a of a lifting-bar orOperating member a said arms Operating in vertical slots a in the backplate or support a. Beneath the frame or carrier a' is a ledge & hearingat its free end a triangular or wedge shaped block co preferably offire-clay or other suitable insulating material.

Slidingly mounted on the frame a' are opposite journal-blocks a in whichare journaled cranks a from the free ends of which project crank-pins orstub-shafts a, carrying electrodes, which are herein shown in the formof carbon-wheels c mounted on insulating-bushings a. To the rear side ofeach bushing is Secured a ratchet-wheel a, engaged by a spring-pawl athe crank a being restricted in its swinging movement bya pin a",engaging a notch a and normally held downward by a spring c and movedupwardly at proper times by the engaging of a pin & on the support awith a rod or arm a which projects rigidly from the rear end of saidcrank. The two journal-bearings a and o the described parts carriedthereby are normally moved inward toward each other by springs (1Spanning across the upper side of the frame a' is a stop, herein shownin the form of a yielding strap or plate 0, adapted to be engaged attimes by the depending middle portion a of a stop a Secured at a to theback plate a. Spring-Contacts a a are provided for completing theelectrical circuit by 7o Contacting with the carbons when the latter areraised.

The operation of myinvention is as follows: Normally the electrodes arein circuit-breakingposition,asshownbythedotted linesw,Fig. l,and when itis desired to create an arc the operator lifts on the bar aj therebyraising the frame and all the parts carried thereby, whereupon theelectrodes slide on the opposite inclined walls of the insulator-block agradu- So ally approaching each other by reason of the springs a untilthey come into contact in the position shown at y. A further upwardmovement swings them into arc-forming position, as indicated at z.Slightly before they arrive at this point the carbons come into contactwith the contact-springs a a, so that when the carbons arrive at thepoint y they complete the circuit. At this time the retarding device aispressed bythe stop afi into holdgo ing en'gagement with thejournal-blocks a preventing them from moving farther forward or changingposition, and thereupon the rods a come intocontact with the pins a, sothat farther upward movement (which is permitted by the yieldingcharacter of the stopping devices) causes the cranks a to turn on theirshafts to the limited extent permitted by the pins a, thereby* swingingthe car-boils away from each other a sufficient distance to produce thearc required. Having used the arc all that is desired, the operatorpermits the bar 01/ to descend, the first lowering movement of thecranks a causing the electrodes to rotate slightly by reason of thepawl-andratclet arrangementot 00 and as soon as the carbons come intocontact With the block a they roll down the same instead of sliding, asthey did in going up. This brings a new carbon-surface into position forthe next time an arc is required.

The feature of swinging the electrodes away from each other after theyhave come into circuit-closing position is broadly claimed in myaforesaid application, where various fieldsofv usefulness of the presentdevice are also eX- plained. It will also be understood that the presentmechanism may be employed with various other features shown in myaforesaid application.

While I have heroin shown the preferred embodiment of myinvention in itsvarious details, I wish it understood that many changes in form,arrangement, and combination of parts may be resorted to withoutdeparting from the spirit and scope of my invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

l. In an apparatus of the kind described, a rotary electrode, a surfaceagainst which it may bear, a support for said electrode, means forrolling said electrode along said surface, and means permitting theelectrode to roll along said surface in moving in one direction and forpreventing said turning in moving in an opposite direction.

2. In an apparatus of the kind described, opposite electrodes forproducing an arc, carrying means manually operated for moving saidelectrodes bodily up and down,and means coperating with one of saidmovements for automatically separating said electrodes and permanentlybreaking the circuit.

3. In an apparatus of the kind described, opposite electrodes forproducing an arc, means holding said electrodes normally separated,carrying means for moving said electrodes bodily up and down, meanscoperating therewith for permitting said electrodes to come together,and means for thereafter moving said electrodes apart to form an arc.

4. In an apparatus of the kind described, opposite electrodes normallyseparated and out of circuit, carrying means for moving said electrodesbodily up and down, and means cooperating therewith for automaticallyseparating said electrodes to form an arc.

5. In an apparatus of the kind described, opposite electrodes forproducing an arc, carrying means for moving said electrodes bodily upand down, means coperating therewith for automaticallyseparating saidelectrodes to form an arc, and automatic means normally tending to movesaid electrodes into position for permanently breaking said arc andcutting out the current therefrom.

6. In an apparatus of the kind described,

opposite electrodes, one of said electrodes having yielding means,normally pressing the same toward the other electrode, and mechanicalmeans for automatically moving said electrode away from said position.

7. In an apparatus of the kind described, opposite electrodes, one ofsaid electrodes having yieldin g means, normally pressing the sametoward the other electrode, separating means for thereafter moving saidelectrode,

ating therewith for normally moving them toward each other, and meansfor moving them into arc forming position after they have come intocircuit-closing position.

10. In an apparatus of the kind described, a pair of electrodes, manualmeans for moving them bodily Upward, means coperating therewith forpermitting them to come into circuit-closing position, and means forthereafter separating them to form an arc.

11. In an apparatus of the kind described, a rotary electrode, a surfaceagainst which it rolls,a spring normally holding said electrode againstsaid surface, means for bodily moving said electrode on said surface,and a cooperating electrode.

12. In an apparatus of the kind described, opposite electrodes, meansfor moving them up and down, means normally holding them yieldinglytoward each other, and a wedgeshaped insulating-block in the path ofsaid electrodes for automatically separatin g them.

13. In an apparatus of the kind described, a frame, opposite electrodeslongitudinally movable on said frame, means for raising and loweringsaid frame, and means including a wedge-shaped device for mechanicallyseparating said electrodes.

14. In an apparatus of the kind described, a pair of electrodes, manualmeans including awedge-shaped device for bodily moving said electrodesto inoperative position, means cooperating with the aforesaid mechanismfor moving said electrodes into circuit closing position upon movementfrom said wedgeshaped device, and means for thereafter moving saidelectrodes into arc-forming position.

IOO

IIO

15. In an apparatus of the kind described,

a frame, journalblocks' movable thereon,

cranks journaled therein, electrodes swinging on the free ends of saidcranks, means normally moving said blocks toward each other, meansautomatically holding said blocks when moved to a predeterminedposition, and means for thereafter swinging said cranks and eleetrodes.

16. In an apparatus of the kind described, a frame, a journal-block, acrank journaled therein, an electrode swinging with said crank, meansfor moving said block on said frame, holding means for restraining saidblock against movement, and means for automatically swinging said crank.

17. In an apparatus of the kind described, a frame, a journal-block, acrank journaled therein, an electrode swinging With said crank, meansfor moving said block on said frame, holding means for restrainingsaidblock against movement, and means for au- J AS. I. AYER.

Witnesses:

STEPHEN E. WOODBURY, DORA A. PROCTOR.

